Validation of a new disposable counting chamber

Area of Science:

• Reproductive Biology
• Andrology
• Laboratory Medicine

Background:

• Accurate sperm concentration is crucial for male fertility assessment.
• Traditional hemocytometer methods can be labor-intensive and prone to error.
• Advancements in counting chambers aim to improve accuracy and efficiency.

Purpose of the Study:

• To compare the accuracy and consistency of three different counting chambers for sperm concentration determination.
• To evaluate both manual and computer-assisted sperm analysis methods.
• To assess the impact of sample preparation (swim-up) on counting chamber performance.

Main Methods:

• Prospective study design comparing Makler, Leja, and hemocytometer counting chambers.
• Sperm samples processed using the swim-up technique to minimize contamination.
• Manual and computer-assisted sperm concentration measurements were performed.
• Statistical analysis of mean differences and coefficients of variation.

Main Results:

• Makler chamber counts were approximately 20 x 10^6 cells/mL higher than hemocytometer counts.
• Leja chambers showed minimal mean differences (around 1 x 10^6 cells/mL) compared to hemocytometers.
• Leja chambers demonstrated consistent and accurate sperm concentration data with coefficients of variation around 20%.

Conclusions:

• Leja counting chambers provide reliable and accurate sperm concentration measurements.
• Both manual and computer-assisted analyses using Leja chambers are suitable for clinical use.
• Leja chambers represent an improvement over Makler chambers for sperm concentration determination.